Capstone · Base Sepolia

Staking Lab

Connect MetaMask, point it at your deployed contract, and clear every checkpoint.

↓ Download starter kit (ZIP)↓ Download lab handout (PDF)

Guided checklist

Auto-detected from on-chain state and your actions this session.

0/8

complete

○
Wallet installed & connected
Install MetaMask and click Connect Wallet.
○
Switched to Base Sepolia (chainId 84532)
Click 'Switch to Base Sepolia' above.
○
Contract deployed & address loaded
Paste your deployed address and press 'Load contract state'.
○
Reward pool funded (contract balance > totalStaked)
As owner, call fundRewards() with some ETH so claims can pay out.
○
Stake tx sent
Enter an amount and press Stake.
○
Rewards accrued (pendingRewards > 0)
Wait a few seconds after staking, then reload state.
○
Rewards claimed
Press Claim once pending rewards are visible.
○
Unstake tx sent
Press Unstake to withdraw your principal.

1 · Contract

Deployed contract addressABI (defaults to SimpleStaking)

.sol .abi

2 · Interact

Amount (ETH)

Your stake

—

Pending rewards

—

Total staked

—

Contract balance

—

Hardhat setup

TypeScript / JavaScript workflow

Install & test

mkdir staking && cd staking && npm init -y
npm install --save-dev hardhat @nomicfoundation/hardhat-toolbox
npx hardhat init  # choose 'Create a JavaScript project'
// Put SimpleStaking.sol in contracts/ and the test in test/
npx hardhat compile
npx hardhat test

Deploy to Base Sepolia

// hardhat.config.js — add Base Sepolia network
networks: { baseSepolia: { url: 'https://sepolia.base.org', accounts: [process.env.PRIVATE_KEY] } }
// scripts/deploy.js:
const s = await ethers.deployContract('SimpleStaking', [1_000_000_000n]);
await s.waitForDeployment(); console.log(await s.getAddress());
npx hardhat run scripts/deploy.js --network baseSepolia

Download SimpleStaking.test.js ↓

Foundry setup

Fast native Solidity workflow

Install & test

curl -L https://foundry.paradigm.xyz | bash && foundryup
forge init staking && cd staking
// Put SimpleStaking.sol in src/ and the test in test/
forge build
forge test -vv

Deploy to Base Sepolia

export PRIVATE_KEY=0x…   # a test-only key with Base Sepolia ETH
forge create src/SimpleStaking.sol:SimpleStaking \
  --rpc-url https://sepolia.base.org \
  --private-key $PRIVATE_KEY \
  --constructor-args 1000000000

Download SimpleStaking.t.sol ↓

Never paste a mainnet private key into a terminal or .env for lab work. Use a fresh MetaMask account funded only with Base Sepolia faucet ETH.